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Author Topic: Still cutting out  (Read 3306 times)

Offline rubjonny

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Re: Still cutting out
« Reply #20 on: 24 April 2009, 17:32 »
are you sure that noise isnt the fuel pumps priming? if it is the ISV something isnt right  :undecided:
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Offline Larky

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Re: Still cutting out
« Reply #21 on: 24 April 2009, 18:18 »
Quote from: rubjonny on 24 April 2009, 17:32
are you sure that noise isnt the fuel pumps priming? if it is the ISV something isnt right  :undecided:

Im pretty sure its the isv i had someone turn the ignition on and i had my head right next to it and it did like i said. It does sound like the fuel pump priming but surely you couldnt hear that right at the front of the car? Should it be a constant buzzing? if it is is it loud enough to be heard? This is the third isv i have had and out of the 3 this was the best it was the only one that when i had it off the car and put power to it that it sparked the other were dead and made it run dead lumpy. It might sound crude but that was what i had been told to do to test it. If this is wrong or the isv sounds like its dead can you tell me or could it be the 32 relay? Thanks for your help jonny i'd be very grateful if the advice can keep coming everything else keeps coming to a dead end.

I have the fuel pump relay no 83 on order should be in tomorrow as one garage i have been to said it sounded like the pump was cutting out, seeing as i've put a new one in i thought this would be a good try.
« Last Edit: 24 April 2009, 18:21 by Larky »
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Offline Larky

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Re: Still cutting out
« Reply #22 on: 25 April 2009, 14:58 »
Been out and put the fuel pump relay in still no luck. Also the vw mechanic gave me a tsi unit? (on top of the ecu) I think thats what he said if its not i've forgot what it was. Plugged that it and thats not causing it. Any more info on the isv would be good if its meant to buzz constantly, i dont think mine is.
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Offline Larky

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Re: Still cutting out
« Reply #23 on: 25 April 2009, 20:42 »
Tried another isv i have cleaned it and this one buzzes all the time when the ignition is on. Seems to have made it idle better to. Still got no further on the cutting out anyone got ideas??  :undecided:
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Offline rubjonny

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Re: Still cutting out
« Reply #24 on: 27 April 2009, 08:32 »
next time it cuts out, listen for the fuel pump. if you dont hear it buzz for a few seconds you have a fuel cut :)
edit: and yes the isv should buzz quietly whenever the ignition is on.
also, was '83' relay a typo? you want 67, 167 or 80 ;)
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Offline vwlemon69

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Re: Still cutting out
« Reply #25 on: 27 April 2009, 22:12 »
sounds like the same prob i have with my 1p engine in my mk2 at the mo.have changed plugs,leads,rotar arm and dizzy cap.drives perfectly but cuts out now and then when you pull up,also if you rev it up revs go up and let it go and it cuts out,getting enoying now so hope one of us finds the prob,will keep you posted .... :wink: 
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Offline Larky

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Re: Still cutting out
« Reply #26 on: 28 April 2009, 16:48 »
Might have been a typo  :rolleyes: i meant 80. The "newer" isv buzzes all the time now. This may help you lemon, had a breakthrough today i put a spark tester (not sure if thats the right name) on a plug and when it/as it cuts out there is no spark. Took this info to one of the guys who has been helping out LOADS and he seems to think that its the chip/unit thats on the side of the dizzy, said hes had problems with these before.
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nige_s

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Re: Still cutting out
« Reply #27 on: 28 April 2009, 17:00 »
I've had a similar problem on a different vehicle that runs a Motronic ECU.  Car would just randomly cut out and take some effort to start again, I changed the speed sensor and checked the usual stuff, earthing points etc for the ECU and so on.  Turned the ECU was at fault, have you tried swapping then out with a different unit?
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